The latest predictions from forecasters indicate that the hurricane’s powerful center will likely be just off south Florida at early Sunday morning—about a day after tropical storm winds pick up in the area.

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Hurricane force winds will extend across the middle of the storm for 100 miles, the office said.

The exact path of the storm is still taking shape, forecasters warn, and Irma could still veer to the east and spare most of the state, according to the National Weather Service. But forecasters are increasingly certain that the storm will impact most of Florida in some way and to some extent—though it remains unclear which parts of the state will see the worst of Irma.

Late Saturday and into Sunday, the worst conditions conditions will arrive in south Florida, National Hurricane Center forecasters say—including torrential rain, storm surge inundation, and hurricane- and tropical storm-force winds, the Weather Channel reports.

Those conditions are likely to arrive in central Florida from Sunday to Monday.

What Irma does on Saturday and Sunday will be key to predicting which areas of south, central and north Florida bear the brunt of the storm. If Irma tracks straight up the spine of Florida, The Weather Channel predicts that tropical storm force winds could batter the east and west coasts of the state simultaneously.

Although the forecast grows less certain as Irma tracks north, the storm will near Georgia on Monday, forecasters say—but dangerous surf and rip currents associated with the storm are likely to start along the Georgia coast Thursday night.

And even if the storm weakens as it moves up Florida, it could still spell trouble for Georgia, according to the Weather Channel.

“Even if Irma’s winds weaken and its Saffir-Simpson category drops, Irma could still be capable of extreme storm surge, depending on its track and the geography of its landfall location(s),” meteorologist Jeff Masons, of the weather website Weather Underground, told The Weather Channel.